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海南岛崖州湾表层沉积物空间分布特征及其受控机制

瞿洪宝 苟鹏飞 孙龙飞 刘刚 韩孝辉 龙根元

瞿洪宝,苟鹏飞,孙龙飞,等. 海南岛崖州湾表层沉积物空间分布特征及其受控机制[J]. 海洋学报,2021,x(7):1–12
引用本文: 瞿洪宝,苟鹏飞,孙龙飞,等. 海南岛崖州湾表层沉积物空间分布特征及其受控机制[J]. 海洋学报,2021,x(7):1–12
Qu Hongbao,Gou Pengfei,Sun Longfei, et al. Spatial distribution and its controlling mechanism of surface sediment in the Yazhou Bay, Hainan Island[J]. Haiyang Xuebao,2021, x(7):1–12
Citation: Qu Hongbao,Gou Pengfei,Sun Longfei, et al. Spatial distribution and its controlling mechanism of surface sediment in the Yazhou Bay, Hainan Island[J]. Haiyang Xuebao,2021, x(7):1–12

海南岛崖州湾表层沉积物空间分布特征及其受控机制

基金项目: 2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC350);海南省科协青年科技英才创新计划(QCXM202008);海南省海洋地质资源与环境重点实验室自主课题(ZZ[2020]2019256-01)
详细信息
    作者简介:

    瞿洪宝(1988-),男,贵州省铜仁市人,主要从事海洋地质调查与研究工作。E-mail:yaobkj@126.com

  • 中图分类号: P736

Spatial distribution and its controlling mechanism of surface sediment in the Yazhou Bay, Hainan Island

  • 摘要: 基于崖州湾海域141个表层沉积物粒度分析数据,研究表层沉积物的粒级组分、粒度参数及其沉积动力环境特征。结果表明,研究区底质类型主要有泥质砂质砾、砾质泥质砂、砂、粉砂质砂、砂质粉砂和粉砂6种,以砂质粉砂分布最为广泛;粒径总体趋势表现为自北向南由细变粗再变细的NEE条带状分布特征,分选系数总体偏高,反映了该区复杂的物源和水动力条件。运用Flemming三角图式,结合粒度象、研究区物源、水动力条件及地形特征,将研究区划分为3个沉积环境:近岸主要受控于波浪掀沙和搬运作用,粒径较细,表现为波控沉积特征;中部主要受控于径流、波浪和潮流共同作用,粒径粗,分选差,表现为河口沉积特征;南部主要受控于潮流输沙作用,波浪作用减弱,粒径细,分选相对较好,表现为相对低能的沉积环境。沉积物输移趋势分析显示研究区中西部为一沉积物汇聚中心,近岸侵蚀物质、宁远河输运物质以及外海潮流输运物质均向该处运移。
  • 图  1  研究区概况及沉积物取样位置

    Fig.  1  Sketch map of the study area and location of sediment sampling

    图  2  研究区沉积物类型分布

    Fig.  2  Distribution of sediment types in the study area

    图  3  崖州湾海域各沉积物类型粒级组分与粒度参数参数(平均值)

    Fig.  3  Grain size parameters of each sediment type in the study area

    图  4  研究区表层沉积物粒级组分百分含量平面分布

    Fig.  4  Plane distribution of different particle-size fractions content percent of the surface sediments in the study area

    图  5  研究区表层沉积物粒度参数平面分布

    Fig.  5  Plane distribution of grain size parameters of the surface sediments in the study area

    图  6  崖州湾海域沉积物三角图式

    Fig.  6  The ternary diagram of sediments in the study area

    图  7  崖州湾海域沉积环境分区

    Fig.  7  Deposition district in the Yazhou Bay

    图  8  崖州湾海域各沉积环境分区沉积物三角图式

    a.崖州湾近岸;b.崖州湾中部;c.南山港岸外海滨

    Fig.  8  Ternary diagrams of different deposition division in the Yazhou bay

    图  9  崖州湾海域表层沉积物C-M

    Fig.  9  The relationship between C&M of the surface sediments in the Yazhou Bay

    图  10  崖州湾海域表层沉积物粒度结构散点图

    Fig.  10  Grain size scatter diagram of the surface sediments in the Yazhou Bay

    图  11  研究区沉积物输运趋势

    a. 特征距离为4 km;b. 特征距离为5.66 km

    Fig.  11  Grain size net trend of the surface sediments in the study area

    表  1  粒度参数定性描述

    Tab.  1  Qualitative description of grain size parameters

    标准偏差偏态峰态
    分选极好<0.35极负偏–1~–0.3很平坦<0.67
    分选好0.35~0.50负偏–0.3~–0.1平坦0.67~0.90
    分选较好0.50~0.71近对称–0.1~+0.1中等0.90~1.11
    分选中等0.71~1.00正偏+0.1~+0.3尖锐1.11~1.56
    分选较差1.00~2.00极正偏>+0.3很尖锐1.56~3.00
    分选差2.00~4.00非常尖锐>3.00
    分选极差>4.00
    下载: 导出CSV
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